OUTDOOR AIRFLOW CONTROLLERS

OAC Series

OAC-3000S

Modules for Systems without an Airside Economizer

EMOA-or-MOA-3000-Transmitter-Angle

OUTDOOR AIRFLOW CONTROLLERS

OAC Series

OAC-3000S

Modules for Systems without an Airside Economizer

The OAC-3000S is a modified version of the OAC-3000. The controller has a built-in real time clock (RTC) that allows a daily or weekend/weekday occupied unoccupied schedule to override or operate in the absence of the binary input.

Contact closure relay can be assigned to notification alarms or active control mode

MS/TP BACnet connection

Overview

The OAC-3000S can be provided with a single integrated IAT-DI duct probe, one or two integrated IAT-UI or IAT-US universal mount probes or an approved external BACnet MS/TP airflow measurement device.

The OAC-3000S interfaces with approved MS/TP BACnet CO2 sensors and occupancy counters when DCV is required.

The OAC-3000S modulates an MP-Bus damper actuator to maintain the outdoor airflow rate. The controller can be configured to operate solely on the schedule or use the schedule with the binary input trigger to activate occupied mode. The binary trigger is typically is provided by a thermostat or other analog or MS/TP BACnet binary output. The trigger can also be provided by the 24 VAC control signal used when a two-position actuator is provided for outdoor air control (replace the two-position actuator with an MP-bus actuator).

Advanced logic and airflow measurement improves traditional CO2-DCV when demand control ventilation is required. The OAC-3000S controller resets the outdoor airflow setpoint between user defined minimum and maximum airflow limits to maintain either a user defined fixed CO2 level or variable airflow setpoint based on the population using a built-in CO2/airflow counting algorithm or external occupancy counter.

The OAC-3000S interfaces with most MS/TP BACnet building automation systems and supports full read/write privileges as a BACnet 1/8 load master. An RS-485 signal isolator is available when an isolated MS/TP network is required.